Green tea extract is a concentrated form of the beneficial compounds found in green tea, primarily polyphenols and catechins. These compounds are known for their antioxidant properties, which help protect cells from damage caused by free radicals. Green tea extract is often used in dietary supplements and health products due to its potential health benefits. Many people take green tea extract for its possible effects on weight management and metabolism. Some studies suggest that it may help increase fat oxidation and improve exercise performance. However, more research is needed to fully understand its effects and benefits for overall health.